JP2008126506A - Washing device for printing machine and printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the time and effort for cleaning the ink supplying passage of a printing machine. <P>SOLUTION: In the washing device 4 equipped on the printing machine 1, washing liquid W is supplied from a washing nozzle 20 to an ink delivering cylinder 11 under the condition that an ink fountain cylinder 10 and the ink delivering cylinder 11 are brought into a non-contact state with each other and a blanket cylinder 14 and paper P are also brought into a non-contact state with each other. When the washing liquid goes around all the cylinders, a washing liquid recovering cylinder 17 is brought into contact with an inking cylinder 12 so as to scrape off waste washing liquid, which is moved to the washing liquid recovering cylinder 17 with a scraping-off washing liquid removing blade 18. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to cleaning a printing press, and more particularly to cleaning an ink supply path.

  In a printing machine, an ink supply path for supplying ink to a recording medium needs to be periodically cleaned in order to maintain high print quality. In addition, when changing the color or the like, it is necessary to clean the ink supply path in order to reduce the printing quality if the ink before the change remains. Patent Document 1 discloses a cleaning method in which at least an ink supply roller adjacent to a plate cylinder is separated from the plate cylinder, a cleaning solvent is supplied to a predetermined portion in the ink supply path, and cleaning is performed. Washing by supplying the cleaning solvent from the ink supply path to the dampening water supply path via the printing plate on the plate cylinder by bringing the adjacent ink supply and dampening water supply rollers into contact with the plate cylinder. A method is disclosed.

JP-A-2-153743, (3) upper column, (4) page lower right column to (6) page upper right column, FIG.

  However, in the technique disclosed in Patent Document 1, it is necessary to clean at least the blanket cylinder separately from the ink supply path in the ink supply source, rather than the plate cylinder. For this reason, there is a problem that the labor required for cleaning becomes complicated. Accordingly, the present invention has been made in view of the above, and an object of the present invention is to provide a printing machine cleaning device and a printing machine that can reduce the trouble of cleaning the ink supply path of the printing machine.

  In order to solve the above-described problems and achieve the object, a cleaning device for a printing press according to the present invention includes a plurality of cylinder groups that receive ink from an ink supply source of the printing press and transfer the ink to a recording medium. A cleaning liquid supply means for supplying a cleaning liquid for cleaning the ink supply path from a predetermined position of the configured ink supply path in a state where all the cylinder groups are in contact; and a predetermined position of the ink supply path. And a cleaning liquid removing means for removing the cleaning liquid from the ink supply path in a state where all the cylinder groups are in contact after the cleaning liquid has spread over the entire ink supply path.

  The cleaning device of this printing machine includes a cleaning liquid supply means for supplying a cleaning liquid for cleaning the ink supply path and a cleaning liquid removal for removing the cleaning liquid from the ink supply path in a state where all the cylinder groups constituting the ink supply path are in contact with each other. Including means. Then, after the cleaning liquid reaches the entire ink supply path, the cleaning liquid is removed from the ink supply path in a state where all the cylinder groups are in contact. As a result, the cylinder group constituting the ink supply path can be cleaned all at once, so that it is not necessary to clean each cylinder, and the labor required for cleaning the ink supply path of the printing press can be reduced.

  Further, in the printing press cleaning apparatus, as in the printing press cleaning apparatus according to the present invention, the cleaning liquid removing means is provided on the ink supply source side rather than the plate cylinder provided in the ink supply path. It is preferable. This can avoid the risk of damaging the plate or the blanket by the cleaning liquid removing means.

  In the printing machine cleaning apparatus, as in the printing machine cleaning apparatus according to the present invention, the cleaning liquid after cleaning is brought into contact with a cylinder constituting the ink supply path at the time of cleaning. It is preferable that a cleaning liquid moving unit is provided, and the cleaning liquid removing unit removes the cleaning liquid after the cleaning moved to the cleaning liquid moving unit. Thus, the cleaning liquid after cleaning can be surely removed from a cylinder with a non-smooth surface or a cylinder with a soft surface.

  Moreover, it is preferable that the cleaning device of the printing press includes a separating unit that separates the ink supply source and the ink supply path during cleaning, as in the cleaning device of the printing press according to the present invention. Thus, it is possible to avoid the cleaning liquid from being mixed into the ink supply source and changing the properties of the ink used for printing.

  In the cleaning device for a printing press, as in the cleaning device for a printing press according to the present invention, the cleaning liquid is supplied to a portion where the cylinders constituting the ink supply path are in contact with each other. preferable. As a result, scattering of the cleaning liquid can be suppressed, so that wasteful consumption of the cleaning liquid can be suppressed.

  Further, as in the printing machine cleaning apparatus according to the present invention, the cleaning liquid regeneration means for removing unnecessary substances as the cleaning liquid from the cleaning liquid after the cleaning removed by the cleaning liquid removing means in the cleaning apparatus of the printing press. It is preferable to provide. As a result, the dirty cleaning liquid after cleaning can be reused, so that effects such as suppression of consumption of the cleaning liquid and reduction of environmental load can be obtained.

  Further, the printing press according to the present invention is characterized in that, in the cleaning device for the printing press, the cleaning device for the printing press is provided in an ink supply path. As a result, the cylinder group constituting the ink supply path can be cleaned all at once, so there is no need to clean each cylinder. As a result, it is possible to reduce the time and effort required for cleaning the ink supply path of the printing press, and the time required for cleaning can be shortened, so that the actual printing time is increased correspondingly and the productivity is improved.

  The cleaning device for a printing press and the printing press according to the present invention can reduce the trouble when cleaning the ink supply path of the printing press.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the best mode for carrying out the invention (hereinafter referred to as an embodiment). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. The present invention is suitable for a water-based ink that can use a water-based cleaning liquid that has a small influence on a plate or a blanket (for example, a decrease in durability). However, the present invention can be applied to other oil-based inks, such as oil-based inks, as long as a cleaning liquid that has a small influence on the plate or blanket (for example, lowering durability) can be used.

  The embodiment is characterized by the following points. That is, a cleaning liquid supply means for supplying a cleaning liquid for cleaning the ink supply path in a state where all the cylinder groups are in contact with each other from a predetermined position of an ink supply path of a printing press constituted by a plurality of cylinder groups, and an ink Cleaning liquid removing means provided at a predetermined position of the supply path for removing the cleaning liquid from the ink supply path. Then, after the cleaning liquid reaches the entire ink supply path, the cleaning liquid is removed from the ink supply path in a state where all the cylinder groups are in contact with each other. Here, the ink supply path is a path through which ink passes, which is composed of a plurality of cylinders (for example, ink supply cylinders and inking cylinders), and receives ink from the ink supply source of the printing press to be recorded. This is the path through which ink passes before it is transferred to the medium.

  When supplying ink from the ink fountain using the ink source cylinder, the ink supply sources are the ink fountain and the ink source cylinder. When ink is supplied directly from the ink head to the ink supply cylinder, the ink supply source is the ink head. For example, in the printing press 1 shown in FIG. 2 described later, the ink fountain IS and the ink source cylinder 10 are the ink supply sources. Further, the ink supply path is composed of a cylinder group existing from the ink delivery cylinder 11 to the blanket cylinder 14, and is a path through which ink passes between the ink delivery cylinder 11 and the paper P.

  FIG. 1 is an explanatory diagram illustrating an overall configuration of a printing system including a printing machine according to the present embodiment. The printing machine 1 according to the present embodiment transfers an image line image (image line image by ink) formed by ink adhering to an image line portion formed on a plate to a printing medium via a blanket. It is an offset printing machine.

  A printing system 2 shown in FIG. 1 includes a printing machine 1 according to the present embodiment for each color to be printed. In printing, since normally four colors of C (Cyan), M (Magenta), Y (Yellow), and K (Black) are used, the printing system 2 has a total for C, Y, M, and K. Four printing machines 1 are provided. The printing machine 1 prints an image line image on the surface of the paper P that is a printing medium. The printing machine 1 shown in FIG. 1 has a printing unit provided on one side of a paper P that is a recording medium and performs printing on one side of the paper P. However, the printing unit is provided on both sides of the paper P and both sides of the paper P are provided. You may comprise so that it can print to.

  FIG. 2 is an explanatory diagram illustrating a configuration of a printing press including the printing press cleaning device according to the present embodiment. In the printing press 1 according to the present embodiment, an ink fountain IS, an ink base cylinder 10, an ink delivery cylinder 11, an inking cylinder 12 made of rubber (for example, nitrile rubber: NBR), a plate cylinder 13, and a rubber blanket are attached. A blanket cylinder 14 is included. Note that the configuration of the printing press 1 is not limited to that shown in FIG. 2, and other cylinders may be provided as necessary.

  As described above, in the printing press 1 according to the present embodiment, the ink supply path is configured by the cylinder group existing from the ink delivery cylinder 11 to the blanket cylinder 14, and the ink is transferred between the ink delivery cylinder 11 and the paper P. Is a route that passes. The cylinder groups existing from the ink delivery cylinder 11 to the blanket cylinder 14 are specifically the ink source cylinder 10, the ink delivery cylinder 11, the inking cylinder 12, the plate cylinder 13, and the blanket cylinder 14.

  Here, the state of FIG. 2 shows a state when the printing press 1 is washed. At the time of cleaning, the ink base cylinder 10 and the ink delivery cylinder 11 are separated from each other, and the blanket cylinder 14 and the paper P are separated from each other. At the time of printing, the ink base cylinder 10 and the ink delivery cylinder 11 are in contact with each other, and the paper P is attached to the blanket cylinder 14 by the backup cylinder 14B.

  Ink I is supplied from the ink fountain IS to the ink base cylinder 10, and ink I of the ink fountain IS is supplied to the ink delivery cylinder 11 that contacts the ink base cylinder 10. In the printing machine shown in FIG. 2, a metal anilox cylinder is used for the ink delivery cylinder 11. The type of the ink delivery cylinder 11 cylinder is not limited to the anilox cylinder, and for example, a rubber cylinder or a cylinder having pores on the surface may be used. Further, the ink delivery cylinder 11 may be a spray supply system that sprays ink onto the ink delivery cylinder 11 using a spray or the like.

  The ink delivery cylinder 11 and the inking cylinder 12 are in contact with each other, and the ink (water-based ink in this embodiment) I applied to the surface of the ink delivery cylinder 11 is transferred to the inking cylinder 12. The inking cylinder 12 and the plate cylinder 13 are in contact with each other, and the ink I applied to the surface of the inking cylinder 12 is transferred to an image line portion of a plate (flat plate) attached to the plate cylinder 13. On the plate attached to the plate cylinder 13, the ink I that forms the image line to be printed on the paper P is transferred to the blanket to which the blanket cylinder 14 is attached, and then transferred to the paper P. Next, cleaning of the printing press 1 will be described.

  When cleaning the printing machine 1, the ink source cylinder 10 and the ink delivery cylinder 11 are brought into a non-contact state, and the blanket cylinder 14 and the paper P are brought into a non-contact state. This mechanism will be described. The ink delivery cylinder 11 is supported by an ink supply cylinder moving arm 22 so as to be swingable about the rotation axis of the inking cylinder 12. The ink supply cylinder moving arm 22 is driven by an ink supply cylinder moving arm driving actuator 24. Here, the ink supply cylinder moving arm 22 and the ink supply cylinder moving arm driving actuator 24 constitute separation means for separating the ink supply source (the ink fountain IS and the ink supply cylinder 10) from the ink supply path. The operation of the ink supply cylinder moving arm driving actuator 24 is controlled by the cleaning control device 30.

  At the time of printing, in order to bring the ink source cylinder 10 and the ink delivery cylinder 11 into contact with each other, the ink supply cylinder moving arm driving actuator 24 is driven by a command from the cleaning control device 30, and the ink supply cylinder moving arm 22 is moved to the ink source cylinder 10. (In the direction of arrow S in FIG. 2). As a result, the ink delivery cylinder 11 supported by the ink supply cylinder moving arm 22 comes into contact with the ink source cylinder 10, and the ink I is supplied from the ink source cylinder 10 to the ink delivery cylinder 11.

  At the time of cleaning, the ink source cylinder 10 and the ink delivery cylinder 11 are brought into a non-contact state, so that the ink supply cylinder moving arm driving actuator 24 is driven by the command of the cleaning control device 30 and the ink supply cylinder moving arm 22 is moved to the ink. It moves away from the original cylinder 10 (in the direction of arrow R in FIG. 2). As a result, the ink delivery cylinder 11 supported by the ink supply cylinder moving arm 22 is separated from the ink origin cylinder 10 and the ink origin cylinder 10 and the ink delivery cylinder 11 are not in contact with each other. Then, it is possible to avoid the cleaning liquid from being mixed into the ink supply source and changing the properties of the ink used for printing.

  When all the ink supply source and the ink supply path are cleaned, the ink delivery cylinder 11 and the ink source cylinder 10 may be brought into contact with each other, that is, the ink supply source and the ink supply path may be connected for cleaning. In this way, since the ink supply source and the ink supply path can be cleaned together, the labor required for cleaning can be reduced as compared with the case where both are cleaned separately. In this case, the ink fountain IS can be efficiently cleaned by supplying the cleaning liquid from the ink supply source (the ink fountain IS in this embodiment).

  At the time of printing, the backup cylinder 14 </ b> B arranged to face the blanket cylinder 14 presses the paper P against the blanket cylinder 14. As a result, the image line image transferred to the blanket attached to the blanket cylinder 14 is transferred to the paper P. At the time of cleaning, the pressing by the backup cylinder 14B is released, and the paper P and the blanket cylinder 14 are in a non-contact state. Next, the configuration of a printing machine cleaning device (hereinafter referred to as a cleaning device) 4 according to the present embodiment will be described.

  The cleaning device 4 includes a cleaning nozzle 20 that is a cleaning liquid supply means, a cleaning liquid recovery cylinder 17 that is a cleaning liquid moving means for moving the cleaning liquid from the ink supply path, and a cleaning liquid that is a cleaning liquid removing means for removing the cleaning liquid from the cleaning liquid moving means. And a scraping cleaning liquid removing blade 18. In addition to this, in this embodiment, the cleaning device 4 stores a cleaning waste liquid reservoir 19 for storing a cleaning liquid after cleaning (hereinafter referred to as cleaning waste liquid) removed by the cleaning liquid removing means, and a cleaning liquid supplied to the cleaning liquid supply means. A cleaning liquid tank 26 for storing the cleaning liquid, and a cleaning liquid reuse device 27 for collecting and reusing the cleaning waste liquid. The cleaning liquid reuse device 27 may not be provided, and the cleaning waste liquid may be discarded as it is.

  When cleaning the ink supply path of the printing press 1, the ink source cylinder 10 and the ink delivery cylinder 11 are brought into a non-contact state, and the ink source cylinder 10 and the ink delivery cylinder 11 are brought into a non-contact state. In this state, the cleaning liquid W is supplied from the cleaning nozzle 20 toward the ink delivery cylinder 11. Thus, in the present embodiment, the cleaning liquid W is supplied from the most upstream side (close to the ink base cylinder 10) of the ink supply path. Accordingly, since the cleaning liquid W can be distributed to the ink supply path using gravity, the cleaning liquid W can be reliably supplied to the entire ink supply path. Here, as the cleaning liquid supply means, for example, a porous member (for example, sponge) impregnated with the cleaning liquid may be used, and the cleaning liquid may be supplied to the ink supply path by bringing it into contact with the ink delivery cylinder 11 or the like. .

  When water-based ink is used for ink I, a water-based one (for example, water or a liquid using water as a solvent) is used for the cleaning liquid W. Since an aqueous cleaning liquid can be used for cleaning when water-based ink is used, the influence on the plate and the blanket is extremely small. For this reason, it is not necessary to separate and clean the cylinder (for example, the ink delivery cylinder 11 or the inking cylinder 12) that is not affected by the cleaning liquid, and the plate or the blanket, and the ink supply path of the printing press 1 is collectively cleaned. be able to.

  When the cleaning liquid reaches the ink supply path of the printing machine 1, the cleaning liquid recovery cylinder 17 serving as a cleaning liquid moving means is brought into contact with the inking cylinder 12, and the cleaning liquid scraping cleaning liquid removing blade 18 is brought into contact with the cleaning liquid recovery cylinder 17. In this embodiment, the cleaning liquid scraping cleaning liquid removing blade 18 and the cleaning liquid recovery cylinder 17 are always in contact.

  In the case where rubber or resin is used for the cleaning liquid scraping cleaning liquid removing blade 18, the cleaning liquid recovery cylinder 17 is preferably configured with a higher hardness than the cleaning liquid scraping cleaning liquid removing blade 18. For example, when a rubber blade is used as the cleaning liquid scraping cleaning liquid removing blade 18, the cleaning liquid recovery cylinder 17 uses metal. Metal may be used for the cleaning liquid scraping cleaning liquid removing blade 18. In this case, the hardness of the cleaning liquid recovery cylinder 17 may not be higher than that of the cleaning liquid scraping cleaning liquid removing blade 18.

  The cleaning liquid recovery cylinder 17 is supported by the cleaning liquid recovery cylinder moving actuator 21 via the cleaning liquid recovery cylinder support arm 23. Then, when removing the cleaning liquid from the ink supply path of the printing press 1, the cleaning liquid recovery cylinder moving actuator 21 brings the cleaning liquid recovery cylinder 17 into contact with the inking cylinder 12. Accordingly, the cleaning liquid that has cleaned the ink supply path of the printing press 1 moves from the inking cylinder 12 to the cleaning liquid recovery cylinder 17 and is removed from the cleaning liquid recovery cylinder 17 by the cleaning liquid scraping cleaning liquid removing blade 18.

  The removal of the cleaning liquid by the cleaning liquid scraping cleaning liquid removing blade 18 means that the cleaning liquid existing in the ink supply path of the printing press 1 is consumed by the cleaning liquid scraping cleaning liquid removing blade 18. Therefore, the cleaning liquid existing in the ink supply path of the printing press 1 is removed by the cleaning liquid scraping cleaning liquid removing blade 18 through the cleaning liquid recovery cylinder 17 and collected in the cleaning waste liquid reservoir 19.

  In the present embodiment, the cleaning waste liquid is recovered through the cleaning liquid recovery cylinder 17 in order to remove the cleaning waste liquid from the inking cylinder 12 formed of rubber. Accordingly, the cleaning waste liquid can be reliably removed from a cylinder having a non-smooth surface or a cylinder having a soft surface. If a metal cylinder having a smooth surface exists in the ink supply path, the cleaning liquid scraping cleaning liquid removing blade 18 may be brought into contact with the metal cylinder to directly remove the cleaning waste liquid from the ink supply path.

  In the cleaning device 4 included in the printing machine 1 according to the present embodiment, the cleaning waste liquid is removed from the inking cylinder 12 disposed almost in the middle of the ink supply path via the cleaning liquid recovery cylinder 17. For this reason, the cleaning waste liquid can be collected at a position where the distances from the cylinders (in the present embodiment, the blanket cylinder 14 and the ink delivery cylinder 11 in this embodiment) are substantially equal to each other. As a result, the time for recovering the cleaning liquid can be shortened as compared with the case of recovering the cleaning waste liquid from the cylinders arranged at both ends of the ink supply path.

  When the ink supply path of the printing press 1 is cleaned, supply of the cleaning liquid is stopped, and the cleaning liquid is continuously removed by the cleaning liquid recovery cylinder 17 and the cleaning liquid scraping cleaning liquid removing blade 18 until the cleaning liquid on the ink supply path is removed. To do. In the cleaning device 4 according to the present embodiment, when the density on the surface of the blanket cylinder 14 becomes smaller than a predetermined value, it is determined that the ink supply path of the printing press 1 has been cleaned. For the density on the surface of the blanket cylinder 14, a densitometer 25 provided in the vicinity of the surface of the blanket cylinder 14 is used. When the cleaning liquid on the ink supply path is removed, the cleaning liquid recovery cylinder moving actuator 21 is operated in accordance with a command from the cleaning control device 30, and the contact state between the cleaning liquid recovery cylinder 17 and the inking cylinder 12 is released.

  The cleaning waste liquid collected in the cleaning waste liquid reservoir 19 is sent to the cleaning liquid reuse device 27 to remove the ink pigment components and dust. As the cleaning liquid reuse device 27, for example, a centrifuge or a filter can be used. The cleaning liquid from which the pigment component and dust are removed is returned to the cleaning liquid tank 26 and reused. As described above, the use of the cleaning liquid reuse device 27 is preferable because the waste can be reduced by effectively using the cleaning liquid, thereby reducing the environmental burden. Next, a cleaning device for a printing press according to a first modification of the present embodiment will be described.

  FIG. 3 is an explanatory diagram illustrating the configuration of a cleaning device for a printing press according to a first modification of the present embodiment. The cleaning device 4A according to this modification has substantially the same configuration as the cleaning device 4 according to this embodiment (see FIG. 2), but differs in that the cleaning liquid is supplied from between the cylinders. The other configuration is the same as that of the cleaning device 4 according to this embodiment, and thus the description thereof is omitted. In FIG. 3, the cleaning control device 30, the cleaning liquid tank 26, and the cleaning liquid reuse device 27 are omitted.

  In the cleaning device 4 </ b> A included in the printing machine 1 according to this modification, the cleaning liquid W is supplied between the inking cylinder 12 and the plate cylinder 13 from the cleaning nozzle 20 that is a cleaning liquid supply unit. The cleaning liquid W may be supplied from between the plate cylinder 13 and the blanket cylinder 14 or between the ink delivery cylinder 11 and the inking cylinder 12.

  In this way, by supplying the cleaning liquid W between the cylinders provided in the ink supply path, when the cleaning liquid W is supplied in the form of a spray using the cleaning nozzle 20, scattering of the cleaning liquid W can be suppressed. it can. Accordingly, since the cleaning liquid W can be used effectively, consumption of the cleaning liquid W can be suppressed, and contamination in the printing press 1 due to scattering of the cleaning liquid W in the printing press 1 can be reduced. Further, since the cleaning liquid W supplied between the cylinders is stretched when passing between the cylinders, the cleaning liquid W can be efficiently spread in the axial direction (width direction) of the cylinder. As a result, the effect of shortening the cleaning time and suppressing the consumption of the cleaning liquid W can also be obtained.

  Further, in this modification, the cleaning liquid is supplied from between the inking cylinder 12 and the plate cylinder 13 which are substantially in the middle of the ink supply path. Accordingly, the cleaning liquid can be spread over the entire ink supply path in a shorter time compared with the case where the cleaning liquid is supplied from the positions at both ends of the ink supply path (the ink delivery cylinder 11 or the blanket cylinder 14). This has the advantage that the cleaning time can be shortened. Next, a cleaning device for a printing press according to a second modification of the present embodiment will be described.

  FIG. 4 is an explanatory diagram illustrating the configuration of a cleaning device for a printing press according to a second modification of the present embodiment. The cleaning device 4B according to the present modification has substantially the same configuration as the cleaning device 4 according to the present embodiment (see FIG. 2), but from the ink delivery cylinder 11 supplied with the cleaning liquid via a rubber cylinder and a metal cylinder. The cleaning liquid is scraped off by the cleaning liquid removing blade 18. The other configuration is the same as that of the cleaning device 4 according to this embodiment, and thus the description thereof is omitted. In FIG. 3, the cleaning control device 30, the cleaning liquid tank 26, and the cleaning liquid reuse device 27 are omitted.

  The printing machine 1 shown in FIG. 4 uses a metal anilox cylinder for the ink delivery cylinder 11, but the surface of the anilox cylinder is not smooth, so that the cleaning liquid scraping cleaning liquid removing blade 18 as cleaning liquid removing means is provided on the surface of the anilox cylinder. Cannot be removed directly from the anilox cylinder. For this reason, in the cleaning device 4B according to this modification, the cleaning liquid moving means for moving the cleaning liquid from the ink supply path is provided via the first cleaning liquid recovery cylinders 16a and 16b and the second cleaning liquid recovery cylinder 15. The cleaning liquid is removed from the ink delivery cylinder 11. Then, the cleaning liquid moved to the second cleaning liquid recovery cylinder 15 is scraped off by the cleaning liquid scraping cleaning liquid removing blade 18.

  The first cleaning liquid recovery cylinders 16a and 16b are made of a flexible elastic body such as rubber or elastomer so as to come into contact with the surface of the ink delivery cylinder 11 made of an anilox cylinder. Further, since the second cleaning liquid recovery cylinder 15 contacts the cleaning liquid scraping cleaning liquid removing blade 18 to scrape the cleaning liquid on the surface, when the cleaning liquid scraping cleaning liquid removing blade 18 is made of rubber or resin, the cleaning liquid scraping cylinder 15 is scraped off. It is made of a material (for example, metal) having a higher hardness than the cleaning liquid removing blade 18. In this modification, two first cleaning liquid recovery cylinders 16a and 16b are used, but the cleaning liquid scraping cleaning liquid removing blade 18 is not limited to this. Next, an example of a procedure for cleaning the printing press using the printer cleaning device according to the present embodiment will be described. In the following, the cleaning procedure by the cleaning device 4 according to the present embodiment (see FIG. 2) will be described, but the same applies to the cleaning devices 4A and 4B according to the first and second modifications of the present embodiment. In the following description, please refer to FIG. 2 as appropriate.

  FIG. 5 is a flowchart illustrating an example of a procedure for cleaning the printing press by the cleaning device for the printing press according to the present embodiment. When cleaning the printing press 1 with the cleaning device 4 of the printing press according to the present embodiment, the cleaning control device 30 determines whether or not there is a cleaning request (step S101). Since cleaning is performed between printing jobs, for example, when the printing press 1 is printing, the cleaning control device 30 determines that there is no cleaning request. If there is no cleaning request (step S101: No), cleaning of the printing press 1 is suspended until there is a cleaning request.

  When there is a cleaning request (step S101: Yes), the cleaning control device 30 drives the ink supply cylinder moving arm driving actuator 24 to move the ink delivery cylinder 11, and the ink delivery cylinder 11 and the ink base cylinder 10 are moved. Is not contacted (step S102). Further, the cleaning control device 30 moves the backup cylinder 14B away from the blanket cylinder 14 (step S102), and brings the blanket cylinder 14 and the paper P into a non-contact state.

  Next, the cleaning control device 30 drives a cylinder constituting the ink supply path of the printing press 1 (step S103), and supplies the cleaning liquid W from the cleaning nozzle 20 to the ink supply path of the printing press 1 (step S104). . Here, the order of steps S103 and S104 is not limited, and the cylinder may be driven after the supply of the cleaning liquid W is started. When the supply of the cleaning liquid W is started, the cleaning control device 30 determines whether or not the cleaning liquid W has spread over the entire ink supply path of the printing press 1 (step S105). For example, in the ink supply path of the printing press 1, when the cleaning liquid W reaches the cylinder that is the farthest away from the cleaning nozzle 20, it is determined that the cleaning liquid W has spread over the entire ink supply path of the printing press 1. Can do. In addition, after the supply of the cleaning liquid W is started, a time for the cleaning liquid W to reach the entire ink supply path of the printing press 1 is obtained in advance, and when the time has elapsed after the supply of the cleaning liquid W is started, It may be determined that the cleaning liquid W has spread over the entire ink supply path.

  When the cleaning liquid W has not spread over the entire ink supply path of the printing press 1 (step S105: No), it waits until the cleaning liquid W reaches the entire ink supply path of the printing press 1. When the cleaning liquid W has spread over the entire ink supply path of the printing press 1 (step S105: Yes), removal of the cleaning waste liquid is started (step S106). In consideration of the time until the cleaning liquid W removes dirt on the cylinder surface, the cleaning liquid is removed after a certain amount of time has passed since the cleaning liquid W has spread over the entire ink supply path of the printing press 1. May start.

  When removing the cleaning liquid, the cleaning control device 30 drives the cleaning liquid recovery cylinder moving actuator 21 to press the cleaning liquid recovery cylinder 17 against the inking cylinder 12. As a result, the cleaning liquid on the inking cylinder 12 moves to the cleaning liquid recovery cylinder 17. In the cleaning device 4 according to the present embodiment, the cleaning liquid removal blade 18 is always in contact with the cleaning liquid recovery cylinder 17, so that the cleaning liquid moved to the cleaning liquid recovery cylinder 17 is pressed by pressing the cleaning liquid recovery cylinder 17 against the inking cylinder 12. It can be scraped off by the cleaning liquid removing blade 18. Note that the supply of the cleaning liquid W is continued even after the cleaning liquid removal blade 18 starts removing the cleaning liquid. As a result, the cleaning liquid from which the stain on the ink supply path has been removed is removed, and a new cleaning liquid W having no stain is supplied instead of the removed cleaning liquid, so that the cleaning of the ink supply path proceeds.

  Next, the cleaning control device 30 determines whether the cleaning is completed (step S107). In this embodiment, this determination is performed as follows. First, the cleaning control device 30 measures the concentration of the surface of the blanket attached to the blanket cylinder 14 by the densitometer 25. When the measured density of the blanket surface is smaller than the preset cleaning end threshold density, it is determined that the cleaning of the ink supply path has been completed. When the cleaning of the ink supply path is not completed (step S107: No), the cleaning control device 30 continues the removal of the cleaning waste liquid by the cleaning liquid removing blade 18 while supplying the cleaning liquid W.

  When the cleaning of the ink supply path is completed (step S107: Yes), the cleaning control device 30 stops the supply of the cleaning liquid W (step S108). Next, the cleaning control device 30 determines whether or not a predetermined time T has elapsed (step S109). The predetermined time T is a time required from when the supply of the cleaning liquid W is stopped until the cleaning liquid W is removed from the ink supply path of the printing press 1. Even after the supply of the cleaning liquid W is stopped, the cleaning liquid W is continuously removed by the cleaning liquid recovery cylinder 17 and the cleaning liquid removing blade 18.

  When the predetermined time T has not elapsed (step S109: No), the cleaning control device 30 continues to remove the cleaning liquid W by the cleaning liquid recovery cylinder 17 and the cleaning liquid removal blade 18 (step S110). When the predetermined time T has elapsed (step S109: Yes), the cleaning control device 30 determines that the cleaning of the ink supply path of the printing press 1 has been completed, and ends the cleaning. Thereafter, the cleaning control device 30 drives the cleaning liquid recovery cylinder moving actuator 21 to separate the cleaning liquid recovery cylinder 17 from the inking cylinder 12 so that they are not in contact with each other, and prepares for the next printing.

  As described above, in the present embodiment and the modification thereof, the cleaning liquid supply unit that supplies the cleaning liquid for cleaning the ink supply path and the cleaning liquid is removed from the ink supply path in a state where all the cylinder groups constituting the ink supply path are in contact with each other. And a cleaning liquid removing means. Then, after the cleaning liquid reaches the entire ink supply path, the cleaning liquid is removed from the ink supply path in a state where all the cylinder groups are in contact. As a result, the cylinder group constituting the ink supply path can be cleaned all at once, so that it is not necessary to clean each cylinder, and the labor required for cleaning the ink supply path of the printing press can be reduced. In addition, since cleaning can be performed without removing cylinders and devices included in the printing press, it becomes easy to realize automation of cleaning.

  As described above, the cleaning device and the printing press of the printing press according to the present invention are useful for cleaning of the printing press, and are particularly suitable for reducing labor when cleaning the ink supply path of the printing press. .

It is explanatory drawing which shows the whole structure of a printing system provided with the printing machine which concerns on this embodiment. It is explanatory drawing which shows the structure of the printing machine provided with the printing machine washing | cleaning apparatus which concerns on this embodiment. It is explanatory drawing which shows the structure of the washing | cleaning apparatus of the printing press which concerns on the 1st modification of this embodiment. It is explanatory drawing which shows the structure of the washing | cleaning apparatus of the printing press which concerns on the 2nd modification of this embodiment. It is a flowchart explaining an example of the procedure which wash | cleans a printing press with the washing | cleaning apparatus of the printing press which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing machine 2 Printing system 4, 4A, 4B Cleaning apparatus 10 Ink former cylinder 11 Ink delivery cylinder 12 Inking cylinder 13 Plate cylinder 14 Blanket cylinder 14B Backup cylinder 15, 16a, 16b Cleaning liquid collection cylinder 18 Cleaning liquid removal blade 20 Cleaning nozzle 21 Cleaning liquid recovery cylinder moving actuator 22 Ink supply cylinder moving arm 23 Cleaning liquid recovery cylinder support arm 24 Ink supply cylinder moving arm driving actuator 25 Concentration meter 26 Cleaning liquid tank 27 Cleaning liquid reusable device 30 Cleaning control device

Claims (7)

A cleaning liquid for cleaning the ink supply path from a predetermined position of an ink supply path configured by a plurality of cylinder groups that receives ink from an ink supply source of a printing press and transfers the ink to a recording medium. A cleaning liquid supply means for supplying all the groups in contact with each other;
A cleaning liquid removing unit that is provided at a predetermined position of the ink supply path and removes the cleaning liquid from the ink supply path in a state in which all the cylinder groups are in contact after the cleaning liquid has spread over the entire ink supply path;
A cleaning device for a printing press, comprising:   The cleaning device for a printing press according to claim 1, wherein the cleaning liquid removing unit is provided closer to the ink supply source than a plate cylinder provided in the ink supply path. At the time of cleaning, the cleaning liquid moving means for moving the cleaning liquid after cleaning from the cylinder in contact with the cylinder constituting the ink supply path,
3. The cleaning device for a printing press according to claim 1, wherein the cleaning liquid removing unit removes the cleaning liquid after being moved to the cleaning liquid moving unit. 4.   The cleaning device for a printing press according to any one of claims 1 to 3, further comprising a separating unit that separates the ink supply source and the ink supply path during cleaning.   The cleaning device for a printing press according to any one of claims 1 to 4, wherein the cleaning liquid is supplied to a portion where the cylinders constituting the ink supply path are in contact with each other.   The cleaning apparatus for a printing press according to any one of claims 1 to 5, further comprising a cleaning liquid regenerating unit that removes unnecessary substances as a cleaning liquid from the cleaning liquid after the cleaning removed by the cleaning liquid removing unit. .   A printing press comprising the cleaning device for a printing press according to any one of claims 1 to 6 in an ink supply path.

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